SentinelOne (S) director Mark S. Peek reports 40,000-share purchase

Rhea-AI Filing Summary

SentinelOne, Inc. director Mark S. Peek reported buying additional shares of the company’s Class A common stock. On 12/16/2025, a trust associated with him purchased 40,000 Class A shares in an open‑market transaction coded “P” at a weighted average price of $14.89 per share, with individual trades ranging from $14.715 to $14.90.

After this transaction, 120,000 shares are held indirectly through the Omega Living Trust, for which he is the sole beneficiary. In addition, 43,501 shares are held directly, and four separate children’s trusts each hold 5,527 shares of Class A common stock.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

PEEK MARK S

(Last) (First) (Middle)

C/O SENTINELONE, INC.

444 CASTRO STREET, SUITE 400

(Street)

MOUNTAIN VIEW CA 94041

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
SentinelOne, Inc. [ S ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
12/16/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Class A Common Stock	12/16/2025		P		40,000	A	$14.89(1)	120,000	I(2)	By Omega Living Trust
Class A Common Stock								43,501	D
Class A Common Stock								5,527	I	By Children's Trust 1(3)
Class A Common Stock								5,527	I	By Children's Trust 2(3)
Class A Common Stock								5,527	I	By Children's Trust 3(3)
Class A Common Stock								5,527	I	By Children's Trust 4(3)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $14.715 to $14.90, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth herein.

2. The reported shares are held by the Omega Living Trust, DTA 8/6/2015 Mark S Peek as Trustee, a revocable living trust, of which the Reporting Person is the sole beneficiary.

3. The reported securities are directly held by an irrevocable trust with a third-party trustee, which was settled by the reporting person and for which a child of the reporting person is the beneficiary.

Remarks:

	/s/ Keenan Conder, Attorney-in-Fact	12/18/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What insider transaction did SentinelOne (S) report in this Form 4?

A director of SentinelOne, Inc., Mark S. Peek, reported an open‑market purchase of 40,000 shares of the company’s Class A common stock on 12/16/2025.

What price did the SentinelOne director pay for the purchased shares?

The 40,000 Class A shares were bought at a weighted average price of $14.89 per share, with individual trades executed between $14.715 and $14.90.

How many SentinelOne shares does the reporting person own after this transaction?

Following the reported trade, 120,000 shares are held indirectly through the Omega Living Trust, 43,501 shares are held directly, and each of four children’s trusts holds 5,527 Class A shares.

How are the indirectly held SentinelOne (S) shares structured for this insider?

The indirectly held shares include 120,000 Class A shares in the Omega Living Trust, a revocable living trust for which Mark S. Peek is the sole beneficiary, and additional shares held in four irrevocable children’s trusts.

What do the children’s trusts hold in SentinelOne stock?

There are four irrevocable children’s trusts, each with a third‑party trustee and a child as beneficiary, and each trust directly holds 5,527 shares of SentinelOne Class A common stock.